In 1300 the "Ciompi" were the workers of the Minor Arts of Florence, such as wool makers, cobblers, dyers, workers, who, together with other humbler tradesmen, represented one of the lowest rungs of the social ladder of the time. The name was due to the hardest work of all, that of "ciompare", or rather "hammering" the leather to soften it. It is precisely from this that was born the saying in Italian language "Se non stai buono ti Ciompo!!" which means "if you are not good, I will ciomp you!", I hammer you, I hit you!"
Since they did not enjoy any representation, the Ciompi were excluded from any political management of the company. In 1378 they rose in a popular revolt, the famous "Tumulto dei Ciompi", one of the first uprisings for economic-political purposes in European history.
A famous square was also dedicated to Florence, the Piazza de 'Ciompi, where for many decades until a few years ago it was the place of the most famous flea markets in Tuscany